CGridCtrl 添加button (CGridCellButton类)

#ifndef __GRID_CELL_BUTTON__
#define __GRID_CELL_BUTTON__
#include "../GridCtrl_src/GridCell.h"  
class CGridCellButton : public CGridCell
{
    friend class CGridCtrl;
    DECLARE_DYNCREATE(CGridCellButton)
public:
    CGridCellButton(void);
    ~CGridCellButton(void);
public:
    virtual BOOL Draw(CDC* pDC, int nRow, int nCol, CRect rect, BOOL bEraseBkgnd = TRUE);
protected:
    virtual void OnClick(CPoint PointCellRelative);
protected:
    CRect m_rect;
    BOOL m_bPushing;
};
#endif

#include "stdafx.h"  
#include "../GridCtrl_src/GridCell.h"  
#include "../GridCtrl_src/GridCtrl.h"  
#include "GridCellButton.h"  


#ifdef _DEBUG  
#define new DEBUG_NEW  
#undef THIS_FILE  
static char THIS_FILE[] = __FILE__;
#endif  

IMPLEMENT_DYNCREATE(CGridCellButton, CGridCell)
CGridCellButton::CGridCellButton(void)
{
    m_bPushing = FALSE;
}
CGridCellButton::~CGridCellButton(void)
{
}
BOOL CGridCellButton::Draw(CDC* pDC, int nRow, int nCol, CRect rect, BOOL bEraseBkgnd /* = TRUE */)
{
    m_rect = rect;
    pDC->SetBkMode(TRANSPARENT);
    rect.DeflateRect(GetMargin(), 0);
    CFont* pOldFont = pDC->SelectObject(GetFontObject());
    pDC->DrawFrameControl(rect, DFC_BUTTON, m_bPushing ? DFCS_BUTTONPUSH | DFCS_PUSHED : DFCS_BUTTONPUSH);
    COLORREF ColorCurrent = pDC->GetTextColor();
    pDC->SetTextColor(::GetSysColor(COLOR_BTNTEXT));
    pDC->DrawText(GetText(), -1, rect, DT_CENTER | DT_VCENTER | DT_SINGLELINE | DT_END_ELLIPSIS);
    pDC->SetTextColor(ColorCurrent);
    return TRUE;
}
void CGridCellButton::OnClick(CPoint PointCellRelative)
{
    m_bPushing = !m_bPushing;
    GetGrid()->InvalidateRect(m_rect);
}